A compound that is capable of achieving an organic EL device that has a high external quantum efficiency and a long lifetime is to be provided, and a compound represented by the following formula (1) is used (wherein in the formula, R.sub.11 to R.sub.17, R.sub.21 to R.sub.28, R.sub.31 to R.sub.38, R.sub.41 to R.sub.45, R.sub.51 to R.sub.55, R.sub.61 to R.sub.64, and L.sub.1 are defined in the description).

##STR00001##

A compound that is capable of achieving an organic EL device that has a high external quantum efficiency and a long lifetime is to be provided, and a compound represented by the following formula (1) is used (wherein in the formula, R.sub.11 to R.sub.17, R.sub.21 to R.sub.28, R.sub.31 to R.sub.38, R.sub.41 to R.sub.45, R.sub.51 to R.sub.55, R.sub.61 to R.sub.64, and L.sub.1 are defined in the description).

##STR00001##

The disclosure relates to the field of organic electroluminescence technologies, in particular to a compound, an organic electroluminescent device and a display device. The compound has a structure as shown in Formula (I), ##STR00001## wherein X.sub.1-X.sub.9 are each independently a C or N atom, and at least one of X.sub.1-X.sub.9 is an N atom; L is selected from substituted or unsubstituted C5-C40 aryl, and substituted or unsubstituted C3-C40 heteroaryl; Ar is Formula (II), wherein X is selected from an O or S atom; R.sub.1-R.sub.6 are each independently selected from substituted or unsubstituted C5-C40 aryl, and substituted or unsubstituted C3-C40 heteroaryl; p.sub.1-p.sub.4 are each independently selected from 0 or 1; p.sub.5-p.sub.6 are each independently selected from 0, 1, 2, or 3; m is selected from 0, 1, 2, or 3; n is selected from 1, 2, or 3; and * represents a connection site.

The disclosure relates to the field of organic electroluminescence technologies, in particular to a compound, an organic electroluminescent device and a display device. The compound has a structure as shown in Formula (I), ##STR00001## wherein X.sub.1-X.sub.9 are each independently a C or N atom, and at least one of X.sub.1-X.sub.9 is an N atom; L is selected from substituted or unsubstituted C5-C40 aryl, and substituted or unsubstituted C3-C40 heteroaryl; Ar is Formula (II), wherein X is selected from an O or S atom; R.sub.1-R.sub.6 are each independently selected from substituted or unsubstituted C5-C40 aryl, and substituted or unsubstituted C3-C40 heteroaryl; p.sub.1-p.sub.4 are each independently selected from 0 or 1; p.sub.5-p.sub.6 are each independently selected from 0, 1, 2, or 3; m is selected from 0, 1, 2, or 3; n is selected from 1, 2, or 3; and * represents a connection site.

An organic electroluminescence device includes an anode, a cathode, a first emitting layer, and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains, as a first host material, a first compound represented by a formula (1) below and having a group represented by a formula (11) below, the second emitting layer contains a second compound represented by one of formulae (2-1D) to (2-4D) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer.

##STR00001## ##STR00002##

An organic electroluminescence device includes an anode, a cathode, a first emitting layer, and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains, as a first host material, a first compound represented by a formula (1) below and having a group represented by a formula (11) below, the second emitting layer contains a second compound represented by one of formulae (2-1D) to (2-4D) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer.

##STR00001## ##STR00002##

The present invention relates to indane derivatives of the formula (I) and mixtures thereof, wherein X is selected from groups of the formula -A-(NAr.sub.2), wherein A is a chemical bond or phenylene which is unsubstituted or substituted by 1, 2 or 3 substituents selected from C.sub.1-C.sub.6-alkyl and C.sub.1-C.sub.6-alkoxy; Ar is unsubstituted or substituted aryl, wherein two groups Ar bound to the same nitrogen atom may together with the nitrogen atom also form a fused ring system having 3 or more than 3 unsubstituted or substituted rings; and the variables Y, n, m, k and l are as defined in the claims and the description. The invention further relates to methods for preparing such compounds and their use in organic electronics, in particular as hole transport material or electron blocking material. ##STR00001##

The present invention relates to indane derivatives of the formula (I) and mixtures thereof, wherein X is selected from groups of the formula -A-(NAr.sub.2), wherein A is a chemical bond or phenylene which is unsubstituted or substituted by 1, 2 or 3 substituents selected from C.sub.1-C.sub.6-alkyl and C.sub.1-C.sub.6-alkoxy; Ar is unsubstituted or substituted aryl, wherein two groups Ar bound to the same nitrogen atom may together with the nitrogen atom also form a fused ring system having 3 or more than 3 unsubstituted or substituted rings; and the variables Y, n, m, k and l are as defined in the claims and the description. The invention further relates to methods for preparing such compounds and their use in organic electronics, in particular as hole transport material or electron blocking material. ##STR00001##

An organic compound having a naphtho fluoranthene core and a hetero aromatic group bonded to a specific position of the naphtho fluoranthene core, an organic light-emitting diode and an organic light-emitting device including the compound are disclosed. Since the organic compound has a narrow Stokes Shift between an absorption wavelength and an emission wavelength, the organic compound has a broad overlapped area between its absorption peak and an emission peak of a delayed fluorescent material, and therefore it can emit blue light with high color purity. It is possible to manufacture an organic light-emitting diode (OLED) and an organic light-emitting device that enhance luminous efficiency and color purity using the organic compound.

An organic compound having a naphtho fluoranthene core and a hetero aromatic group bonded to a specific position of the naphtho fluoranthene core, an organic light-emitting diode and an organic light-emitting device including the compound are disclosed. Since the organic compound has a narrow Stokes Shift between an absorption wavelength and an emission wavelength, the organic compound has a broad overlapped area between its absorption peak and an emission peak of a delayed fluorescent material, and therefore it can emit blue light with high color purity. It is possible to manufacture an organic light-emitting diode (OLED) and an organic light-emitting device that enhance luminous efficiency and color purity using the organic compound.